Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Computer Science > Wired and Wireless Networks Finished > Flashcards

Wired and Wireless Networks Finished Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is a network

A

Two or more computers connected together with the purpose of communication

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How can networks be connected (2)

A

Wired media such as cables

Wireless media such as WiFi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a computer or device that isn’t connected to a network called

A

A stand-alone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the advantages of using networks (8)

A 
File sharing
Hardware sharing
Communication
Roaming access
Centralised maintenance and updates 
Centralised security 
User monitoring
Levels of access
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the disadvantages of networks (4)

A

Cost
Requires trained management
Spread of malware
Hacking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does LAN stand for

A

Local area network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does WAN stand for

A

Wide area network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a LAN

A

A network that is geographically confined to one building or site

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where are LANs commonly used (3)

A

Small businesses/organisations
Schools
Homes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a WAN

A

A network spread over a wide geographical area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Where are WANs commonly used

A

Organisations that have more than one office or branch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

One example of a WAN

A

The internet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the different models for connecting computers over a network (2)

A

Client-server networks

Peer-to-peer networks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a server in a client-server network

A

A computer that manages and stores files

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the different types of servers and what do they do (5)

A

File servers - hold and maintain user files
Applications servers - allow programs to be run over a network
Web servers - hold and share web pages
Print servers - manage printing across a network
Mail servers - handle emails between users

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a client

A

A computer that relies on servers to provide and manage data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the function of a peer-to-peer (P2P) network

A

Each computer in a status has equal control over the network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does a computer need to connect to a network (3)

A

Network interface controller (NIC) or wireless NIC
Wired or wireless transmission medium
A point to connect to such as a router, hub, switch or wireless access point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does a NIC do

A

Provides a method of connecting to a network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does a NIC provide (2)

A

An interface port for a wired connection or

A radio transceiver for connecting wirelessly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What do transmission media do

A

Carry data signals from one computer to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the different types of transmission media (2)

A

Twisted copper wire

Fibre-optic cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are the properties of twisted copper wire (3)

A

Cheap
Up to 1 GB per second transmission speed
Reliable up to 100 metres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What are the properties of fibre-optic cable (3)

A

Expensive
Over 40 TB per second transmission speed
Reliable over 2km

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What are the advantages of wired connections (2)

A

Reliable

Not usually subject to interference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What are the disadvantages of wired connection

A

Limited mobility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What are the advantages of wireless connections

A

Can connect to a network as long as it’s in range of the wireless access point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the disadvantages of wireless connections

A

Subject to magnetic interference
Limited in range
Can be blocked by walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What are the types of network connection devices (NICs) (4)

A

Hubs
Switches
Wireless access points
Routers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What is a hub

A

A small device that allows wired devices to connect to a network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What are the disadvantages of a hub

A

It has no knowledge of devices connected so all traffic is transmitted to all connected computers which affects network performance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Why are switches better than hubs

A

A switch records which computers are connected so it only sends traffic where it needs to go which improves network performance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

How does a wireless access point (WAP) work

A

It uses a radio transceiver to allow wireless connections to a network
It then sends wireless traffic to the main wired network

34
Q

What is a router used for

A

Sending data signals across the internet

35
Q

How do routers work

A

They collect knowledge of available routes to transmit data then determine the most suitable route

36
Q

What do routers in homes include (3)

A

A hub
A WAP
Sometimes a modem

37
Q

What does a modem do

A

Allows the user to connect to the internet

38
Q

What is the internet

A

The network infrastructure of a worldwide collection of computer networks

39
Q

What is the purpose of the internet

A

To enable communication on an international scale

40
Q

What model does the internet predominantly use

A

Client-server model

41
Q

How does the internet use to client-server model (3)

A

Web servers - store and maintain web content
Mail servers - handle web-based email
Media servers - allow clients to stream music and videos

42
Q

What is hosting

A

The storing of files and data on a web server

43
Q

What is the web server referred to in hosting

A

The host

44
Q

What is the URL

A

Uniform resource locator - includes the host name for a website

45
Q

What does the host consist of

A

Three hierarchical levels which work in reverse order of the name

46
Q

Examples of the top level root of a URL (5)

A 
.com
.uk
.net
.gov
.edu
47
Q

What does the second level of a URL do

A

Denotes the type of organisation

48
Q

Examples of the second level of a URL (4)

A

.co
.org
.sch
.ac

49
Q

What does the third level of a URL do

A

Shows the organisation name

50
Q

Examples of the third level (4)

A

bbc
ocr
microsoft
apple

51
Q

What does DNS stand for

A

Domain name server

52
Q

What is the format of a network address

A

Four sets of three digits

53
Q

Why are domain names used

A

It is difficult for users to remember network addresses

54
Q

What happens when a user enters a URL

A 
A DNS (domain name server) takes the domain name and looks up its equivalent network address
The user's request is then forwarded to the server that resides at that network address
55
Q

What is The Cloud

A

A generic term for remotely accessed storage

56
Q

How is The Cloud accessed

A

Through the internet

57
Q

Where is data on The Cloud stored

A

On a server in a random location connected to the internet

58
Q

What are the advantages to using The Cloud (3)

A

The ability to access files from any location or any device
Access can be granted to other users that can access your data
The need to make backups is reduced as cloud storages back up your data automatically

59
Q

What are the disadvantages of using The Cloud (3)

A

There is no guarantee someone else is not accessing your data
There is no guarantee your data is being backed up
Access to data is only possible with an internet connection

60
Q

How has the term ‘the cloud’ been turned in recent years

A

It is also a term for internet-based software facilities

61
Q

What are the characteristics of internet-based software facilities (‘the cloud’) (2)

A

They offer limited versions of popular software

Ideal for low-powered devices or users that spend a lot of time travelling

62
Q

What is a virtual network

A

A network of geographically unrelated computers connected together via the internet

63
Q

How do virtual networks form their connections

A

Through the internet

64
Q

What do virtual networks allow (2)

A

File sharing

Communication

65
Q

Why do some organisations use virtual networks

A

To enable users to work from home as if they were in their workplace

66
Q

What is network performance

A

Response time - how fast a message can be sent or how quickly a document can be retrieved

67
Q

What are the factors that affect network performance (5)

A 
Number of devices on a network
Bandwidth of the transmission medium
The type of network traffic
Network latency
Number of transmission errors
68
Q

What is bandwidth

A

A measure of the amount of data that the medium can transfer over a given period of time

69
Q

What is the bandwidth of twisted copper wire

A

1 gigabit (Gb) per second

70
Q

What is the bandwidth of fibre-optic cable

A

Over 40 terabits (Tb) per second

71
Q

What is the bandwidth of home Wi-Fi

A

54 megabits (Mb) per second

72
Q

What is the bandwidth of business Wi-Fi

A

1 gigabit (Gb) per second

73
Q

What happens to the bandwidth when a device joins a network

A

It gets divided between them equally, depending on the traffic being streamed

74
Q

What is the network latency

A

A measure of how long it takes a message to travel from one device to another

75
Q

What factors affect the network latency (2)

A

Number of devices on the network

Type of connection device

76
Q

Why do hub-based networks experience more latency than switch-based

A

Hubs broadcast all messages to all devices whereas switches broadcast messages only to the intended recipient

77
Q

What is fibre-optic generally used for

A

Allowing high data transmission between buildings

78
Q

What is TCW (twisted copper wire) generally used for

A

Runs from switches within buildings to individual devices

79
Q

What is Wi-Fi generally used for

A

Allowing guest devices to connect to the network

80
Q

What is a collision

A

When two devices on a network try to communicate simultaneously along the same communication channel

81
Q

When do more collisions occur

A

When there are more devices on a network

Computer Science (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions